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- The design, building, and use of engines, machines, and structures. For any engineering topics not applicable to the categories below.
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Jan16-12 Greg Bernhardt
We always have threads on various pieces of the puzzle, but what I want here is for people to post a coherent plan of...
Aug13-14 11:01 PM
jim hardy
1,039 238,052
You're just one click away from posting your homework help request! Click here to post.
May17-14 06:51 PM
Redbelly98
0 2,715
A number of questions, particularly involving homework, often involve some basic engineering. In the US, the...
Nov22-13 02:02 PM
rneale
38 61,988
Hi! Does anyone knows where to find a small canister of compressed nitrogen for cleaning purposes? I want to clean...
Jun15-11 05:50 AM
carapauzinho
0 1,599
Hey all, I'm using a peltier device for a cooling system I'm working on. The metal leads connecting the peltier to...
Jun14-11 01:14 PM
Kvm90
0 1,355
I am about to go into my 3rd year of my Electronic Engineering degree, and as part of that I will be taking part in a...
Jun14-11 11:40 AM
Blenton
3 1,627
Imagine that the electro motor is rotating the blades in air at sea level: http://i53.tinypic.com/33fggaw.jpg During...
Jun13-11 09:54 AM
Eagle9
17 4,449
Okay, this might sound stupid, but what does the "M" in Mbtu stand for? I know what it means, 1,000 x btu, but how...
Jun12-11 05:50 PM
bjhenders88
20 60,124
I passed my statics course and am currently taking material stength course. The thing that has been on my head is...
Jun11-11 05:20 PM
PhanthomJay
3 3,549
Here is the news: http://uk.news.yahoo.com/21/20091013/ttc-dyson-launches-bladeless-fan-e1d36ba.html Who can explain...
Jun11-11 02:07 AM
dylanchong
34 8,668
I am looking for a very simple downloadable program that allows me to create simple 2D designs of mechanical parts....
Jun10-11 10:53 PM
MATLABdude
2 3,913
actually i want two write a review article on issues related to civil engineering such as earthquake...
Jun10-11 10:05 PM
fusion911
2 2,005
Hi, I am trying to run 2 solvers in comsol4.1, where the solution of the first one is the initial condition for the...
Jun10-11 08:34 AM
SKH
0 1,078
I have observed that a pneumatic motor runs much faster on helium than air at the same tmeperature. Why is this? Is...
Jun10-11 07:28 AM
darrelu
9 3,054
I am building a St. Louis Motor for a project in my AP physics class. I followed the directions the best i could and...
Jun9-11 10:30 PM
DaveC426913
3 1,878
Hi, I am using COMSOL Script and I am trying to figure out something. Let's say I am only solving one PDE which...
Jun9-11 05:08 PM
SKH
4 6,834
i jst wntd 2 knw wht r the thngs i should do (i mean like which entrance tsts should i take or r thre any othr...
Jun9-11 01:25 PM
256bits
1 1,397
Hello, I have got a SR250 boxcar averager. I have got the manual, but still I dont understand how to use the active...
Jun9-11 06:26 AM
omer korech
1 2,344
Hi all, I am involve in a group assignment where a water compressor will be used to produce high pressured water. ...
Jun8-11 09:50 PM
MATLABdude
3 2,911
Just finished 3rd semester at city college. Came back to school to become an engineer, figured I'd find my niche, but...
Jun8-11 04:42 PM
blaughli
0 1,438
I know I have read something similar to this topic in the forums a few times over and found most of the responses to...
Jun8-11 02:59 PM
brewnog
6 2,613
Okay, I'm no engineer, but I'm in need of some! I'm looking to build a type of cable system, and not even sure where...
Jun7-11 09:41 PM
turbo
1 1,342
I am trying to determine both a gear ratio AND rpm/ft.lbf of a driver gear. My selected gear ratio is 9:1, I am...
Jun7-11 08:54 PM
SteamKing
13 5,083
So I have a problem. I have a measurement of several different points and I would like to compare that to the...
Jun7-11 12:39 PM
dingo_d
1 1,227
Hello, I'm a junior engineer, and I'm facing a physics/maths problem, for my new project. I dont know all the...
Jun5-11 11:17 AM
akkon83
17 2,788
Hi all, I am not sure if this is the right place to ask but I have two problems which I require enlightenment. The...
Jun5-11 09:15 AM
Studiot
2 1,515
I need to find the forces in the axial members, loading on the lifting eyes and pulley shaft. Attached is a photo of...
Jun4-11 12:15 AM
SteamKing
1 2,733
I'm trying to get a mask made that will deflect a incoming bullet, and in my mind geometry is the answer. I don't...
Jun3-11 07:36 AM
Ryan_m_b
6 3,744
Hey guys, I am completely stumped right now (in many different ways). I am a senior in Electrical Engineering and...
Jun2-11 09:36 AM
Mech_Engineer
8 3,120
Hi, I'm stuck on this progress checker question. ive come up with the answer of 6,041875 Nmm or 6,042 NM but this is...
Jun2-11 09:36 AM
nvn
10 8,321
Ive got this question but i dont know how to answer it. A steam boiler produces steam at a rate of 0.5 kg.s-1. If...
Jun1-11 11:10 AM
Mech_Engineer
6 2,424
I have a question regarding constructing subway platforms in curved line. As we know, in a curve, wagons get out of...
Jun1-11 06:02 AM
yabi
11 2,962
currently, i'm be studying on improving fire tube boiler's combustion efficiency. so, i need a software which is...
May31-11 07:28 AM
daceymathers
2 2,210
Hello Physics Forums, I am a tenth grade student looking into a possible engineering/science project. I wanted to know...
May30-11 10:53 PM
Bob S
3 2,308
I'm looking to fabricate a small version of this device http://energyconservatory.com/products/products7.htm , which...
May27-11 07:06 PM
256bits
1 4,359
hello. i am wondering if it is possible to charge lipo battery packs with a li-ion charger. for example what i...
May27-11 04:42 PM
Topher925
6 7,963
Hi. I've forgotten some of my basic physics so maybe someone can point me in the right direction. I want to hook up...
May26-11 06:20 PM
Daiquiri
1 3,388
Hi everyone. I'm trying to find a proper wording for "Calculations made to show the fatigue resistance of a railcar...
May26-11 11:59 AM
DickL
12 2,178
Hi, i'm an incoming 3rd yr. civil engineering student from the Philippines. During my previous years as a freshman and...
May25-11 08:11 PM
edgepflow
3 2,774
Hello, I am working on a project this summer and I have run into a problem that I need a bit of help with. If I heat a...
May25-11 11:08 AM
AlephZero
1 1,521
hi guys i'm a junior student majoring in EE and I'm looking for an online engineering statics for the summer...
May24-11 09:38 AM
Hardy123
1 1,754
Hi all, I am looking for ways to make the house more efficient in winter. Are there any disadvantages to piping the...
May24-11 05:51 AM
dotancohen
12 6,218
Just a really basic question, say you have a shaft about 25meters long and at the end of the shaft there is a force of...
May24-11 04:34 AM
tiny-tim
6 4,255

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